add a Cypher System dice rolling library method

not available to the bot, yet, but that's next

Signed-off-by: Brian S. Stephan <bss@incorporeal.org>

requirements/requirements-dev.txt

@@ -152,6 +152,10 @@ more-itertools==10.5.0
     #   jaraco-functools
     #   jaraco-stream
     #   jaraco-text
+numexpr==2.10.1
+    # via dr.botzo (pyproject.toml)
+numpy==2.1.3
+    # via numexpr
 packaging==24.1
     # via
     #   build

requirements/requirements.txt

@@ -49,6 +49,10 @@ more-itertools==10.5.0
     #   jaraco-functools
     #   jaraco-stream
     #   jaraco-text
+numexpr==2.10.1
+    # via dr.botzo (pyproject.toml)
+numpy==2.1.3
+    # via numexpr
 parsedatetime==2.6
     # via dr.botzo (pyproject.toml)
 ply==3.11